en تخصصي Special Original article Original article <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:115%"><b><span style="line-height:115%">Background: </span></b><span style="line-height:115%">Fermented foods are gaining interest because of their ability to improve health, as well as their good taste, and the desire of many to eat them. This investigation aimed to enhance the chemical and physical properties, sensory evaluation, and shelf life of fermented orange juice by adding liquid hibiscus leave (<i>Hibiscus sabdariffa</i>) and potato peel (<i><span style="background:white">Solanum tuberosum</span>)</i> extracts.<span style="font-family:"Times New Roman","serif""></span></span></span><br> <span style="line-height:115%"><b><span style="line-height:115%">Methods:</span></b> <span style="line-height:115%">The extracts of hibiscus leaves and potato peel were added to fermented orange juice, and the samples were divided into five parts. Two parts with different concentrations of hibiscus leave extracts (5%, FHL₅ and 10%, FHL₁₀), and the other two parts with different concentrations of potato peel extracts (5%, FPP₅ and 10%, FPP₁₀). The Fifth part was fermented orange juice without any additives (PC). Then, they were estimated for the acidity, total solid solution, viscosity, carbohydrates, vitamin C, antioxidants profile, color, total microbial count, and sensory evaluation during storage time at 4&plusmn;2 &deg;C. Statistical analysis was done by IBM SPSS&nbsp; version 25.0 software.<span style="font-family:"Times New Roman","serif""></span></span></span><br> <span style="line-height:115%"><b><span style="line-height:115%">Results:</span></b> <span style="line-height:115%">The results showed no significant mean difference (<i>p></i>0.05) between samples in acidity. FHL₁₀ registered the highest values in total solid solution, vitamin C, antioxidants profile, and sensory evaluation, while FPP₁₀ registered the highest values in viscosity and total microbial count. Also, FPP₁₀ registered the highest values in overall acceptability (8.85&plusmn;0.24, 8.78&plusmn;0.26, 8.71&plusmn;0.26, and 8.78&plusmn;0.26 at zero, 7^th, 14^th, and 21^st days of storage time, respectively) followed by FPP₅ with no significant mean difference values (<i>p></i>0.05).<span style="font-family:"Times New Roman","serif""></span></span></span><br> <span style="line-height:115%"><b><span style="line-height:115%">Conclusion:</span></b> <span style="line-height:115%">The extracts of hibiscus leaves and potato peel can improve acceptability and shelf life of fermented orange juice summarized in the enhancement vitamin content, antioxidants profile, color, and sensory properties.</span><br> <br> <b><span style="line-height:115%"><span style="color:black">DOI:</span></span></b> <span style="line-height:115%">10.18502/jfqhc.10.1.11988</span></span></span></span></div> Antioxidants, Hibiscus, Fermentation, Colony Count, Microbial, Citrus 39 50 http://jfqhc.ssu.ac.ir/browse.php?a_code=A-10-1398-1&slc_lang=en&sid=1 A.R.E. El-Hadary el.hadary.a.r.e@gmail.com 0000-0002-7412-4562 Yes Food Science Department, Faculty of Agriculture, Zagazig University, Zagazig, Egypt,44511 A.M. Sulieman No Food Science Department, Faculty of Agriculture, Zagazig University, Zagazig, Egypt,44511 G.A. El-Shorbagy No Food Science Department, Faculty of Agriculture, Zagazig University, Zagazig, Egypt,44511